BB-Chevy Race-Rite 26° Cylinder Heads
• 294cc Rectangle Intake Ports
• 119cc Combustion Chambers
• .600'' Max Lift
• 140 lb. @ Seat
• 1.550'' Valve Springs
• Assembled, Sold in Pairs
  
  
  Cylinder Head Specifications
• Intake Port: 294cc
• Chamber Volume: 119cc
• Valve Sizes: Intake 2.250' / Exhaust 1.880'
• Exhaust Pattern: Standard
• Valve Centerline: Standard

  Cylinder Head Recommendations

• Cubic Inch: 396-502
• Compression: 9.1 Minimum
• Camshaft: Hydraulic/Hydraulic Roller
• RPM: 2000-6000
• Application: Pro Street/Drag Race

  Facts and Related Components

• Torque Heads: 70 ft. lbs.
• Torque Rocker Studs: 40-45 ft. lbs.
• Accessory bolt holes are drilled
• Spring Pockets: May not be cut any larger or deeper than 1.625'
• Valve Angle: 26° and 4° intake, 17° and 4° exhaust
• Angle Milling: .0066' per cc
• Flat Milling: .0050' per cc
• Pushrod Slots: Standard
• Stud Girdle: Standard
• Rocker Arms: Standard
• Lifters: Standard
• Pistons: Standard
• Pushrods: Check pushrod clearance with head installed on the engine block before final assembly.
• All newer Brodix Big Block heads will fit Mark IV, Gen. V, and Gen. VI blocks

  Package Heads

• PS CB: Valve bowls blended
• PS MI: Match intake port to FP 1211
• PS Valve job: Competition valve job
• Intake Valves: 2.250' x 5.218' o.a.l.
• Exhaust Valves: 1.880' x 5.394' o.a.l.
• Valve Springs: 1.550' dia. Hydraulic roller valve spring 140 lb. closed, 400 lb. open, 1.950' installed height, .600' maximum lift
• Retainers: 1.550' 10° Steel
• Valve Locks: 10° jumbo
• Rocker Studs: 7/16'
• Guide Plates: 3/8'
• Valve Seals: 11/32'
  Flow Chart cfm @ 28' H2O
  

  Heads	Valve Size	0.200	0.300	0.400	0.500	0.600	0.650	0.700
  RR BB-O	2.250' Intake	160	227	279	317	328	336	340
  	1.880' Exhaust	106	137	164	188	211	221	229
  RR BB-O(CNC)	2.250' Intake	161	228	281	321	339	343	346
  	1.880' Exhaust	112	146	178	203	222	230	235

Emissions Note:

This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

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